wallet: Add wallet/types.h for simple public enum and struct types

Move isminetype and isminefilter there this commit, add WalletPurpose type next
commit.

src/qt/transactiondesc.cpp

@@ -20,7 +20,7 @@
 #include <policy/policy.h>
 #include <util/system.h>
 #include <validation.h>
-#include <wallet/ismine.h>
+#include <wallet/types.h>
 
 #include <stdint.h>
 #include <string>

src/qt/transactionrecord.cpp

@@ -7,7 +7,7 @@
 #include <chain.h>
 #include <interfaces/wallet.h>
 #include <key_io.h>
-#include <wallet/ismine.h>
+#include <wallet/types.h>
 
 #include <stdint.h>